DOI: 10.1002/2013GL057942
论文题名: Elastic dynamics and tidal migration of grounding lines modify subglacial lubrication and melting
作者: Sayag R. ; Worster M.G.
刊名: Geophysical Research Letters
ISSN: 0094-8360
EISSN: 1944-8091
出版年: 2013
卷: 40, 期: 22 起始页码: 5877
结束页码: 5881
语种: 英语
英文关键词: grounding line migration
; ice sheet dynamics
; ice sheet mass balance
; subglacial hydrology
; subglacial lubrication
Scopus关键词: Deformable foundations
; Effective elastic property
; Elastic modeling
; Grounding line
; Ice sheet dynamics
; Mass balance
; Ocean thermals
; Subglacial hydrology
; Dynamics
; Elasticity
; Glaciers
; Lubrication
; Melting
; Remote sensing
; Ice
; cryosphere
; grounding line
; ice sheet
; ice shelf
; melting
; remote sensing
; subglacial environment
; tidal cycle
英文摘要: We combine the dynamics of ice, bed, and ocean in a new elastic model for the tidal-timescale migration of grounding lines on deformable foundations. Previous interpretations of tidal flexure using models of elastic ice shelves with fixed grounding lines were found to be inconsistent, suggesting an elasticity of ice that varies spatially and temporally and that is significantly smaller than measured experimentally. We argue here that with our model, a consistent, purely elastic interpretation can be made. Combining this new approach with remote-sensing measurements, we show that the grounding line migrates several kilometers during a tidal cycle, that we can infer the effective elastic properties of the bed, and that the elastic pressure of the ice leads to a hydrological barrier near the grounding line that controls subglacial hydrology. Our findings imply that subglacial lubrication and melting induced by the ocean thermal forcing can increase substantially during high tide. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887738899&doi=10.1002%2f2013GL057942&partnerID=40&md5=38517fb3c2842b51b5821b9cce0cbf25
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5624
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Theoretical Geophysics, Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, United Kingdom
Recommended Citation:
Sayag R.,Worster M.G.. Elastic dynamics and tidal migration of grounding lines modify subglacial lubrication and melting[J]. Geophysical Research Letters,2013-01-01,40(22).